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改良玻璃轻石对雨水径流高效脱氮研究
宫彦章,韩梦梦,粟春青,罗炘武,高育慧,郑卫国
深圳文科园林股份有限公司
摘要:
为了改良玻璃轻石对雨水径流高效脱氮的影响, 以沸石、 蛭石、 陶粒、 普通玻璃轻石、 改良 玻璃轻石为渗滤柱填料, 分析人工配制雨水流经渗滤柱在不同运行时间 (5, 10, 20, 30, 40 h) 及不同 出水口对径流雨水 TN 和 NH + 4 -N 的去除效果。 结果表明: 改良玻璃轻石 ∶ 沸石 ∶ 蛭石 ∶ 陶粒 = 4 ∶ 2 ∶ 2 ∶ 2 (体积比) 分层填装的渗滤柱对 TN 的去除率达到了 92. 71%, 改良玻璃轻石 ∶ 沸石 ∶ 蛭石 ∶ 陶粒 = 4 ∶ 2 ∶ 2 ∶ 2 (体积比) 混合填装的渗滤柱对 NH + 4 -N 的去除率达到了 92. 81%, 出水浓度达到 《地表水环 境质量标准》 (GB 3838—2002) III 类标准。 在基础填料中添加改良玻璃轻石有效改善了填料渗滤性, 使 渗滤柱对雨水中的 NH + 4 -N、 TN 均具有较好的去除效果, 且在运行 10 h 时基质层深 65 cm 处过滤吸附作 用最好。
关键词:  海绵城市  改良玻璃轻石  雨水径流  高效脱氮
DOI：
分类号:
基金项目:深圳市科技计划项目 (KCXFZ202002011006491)。
RResearch on High-efficient Nitrogen Removal of Pollutants in Rainwater Runoff by Modified Glass Pumice
GONG Yanzhang1, HAN Mengmeng1, SU Chunqing1, LUO Xinwu1, GAO Yuhui1, Zheng Weiguo2
1.Shenzhen Wenke Garden Co.,Ltd.;2.深圳文科园林股份有限公司
Abstract:
This study investigated the efficient nitrogen removal of pollutants in rainwater runoff by modified glass pumicer. Zeolite, vermiculite, ceramsite, ordinary glass pumice, and modified glass pumice were used as filtration materials, this study developed a system composed of artificial rainwater and infiltration column to simulate the purification effect of bioretention pool on rainwater runoff at different operation time (5, 10, 20, 30, 40 h) and different outlets, to study the pollutant removal effect of TN and NH + 4 -N in rainwater runoff of modified glass pumice. The results showed that the TN removal rate of the modified glass pumice ∶ zeolite ∶ vermiculite ∶ ceramsite = 4 ∶ 2 ∶ 2 ∶ 2 ( volume ratio) layered filling filtration column reached 92. 71%, while the NH + 4 -N removal rate of the modified glass pumice ∶ zeolite ∶ vermiculite ∶ ceramsite = 4 ∶ 2 ∶ 2 ∶ 2 (volume ratio) mixed filling filtration column reached 92. 81%, and the TN and NH + 4 -N content all met the Class III standard of Environmental Quality Standard for Surface Water ( GB 3838—2002). The addition of modified glass pumice to the basic filtration materials has a good filtration adsorption effect on the four pollutants and effectively improves the permeability of filtration materials. In a comprehensive view, the best removal effect is achieved at the depth of 65 cm of the substrate layer, when running for 10 h.
Key words:  sponge city  modified glass pumice  rainwater runoff  high-efficient nitrogen removal